Q. Question 3Given that −6≤x≤3 and 1≤y≤5, find the greatest possible value of x2+y2.
Given Ranges: We are given the ranges for x and y:−6≤x≤31≤y≤5We need to find the greatest possible value of the expression x2+y2.To maximize the expression, we need to find the maximum values of x2 and y2 within the given ranges.
Maximize x2: For x2 to be maximum, we need to find the value of x that gives the largest square within the range −6≤x≤3. Squaring a negative number or a positive number both give a positive result, and the square of a larger absolute value is greater. Therefore, the maximum value of x2 occurs at x=−6. Calculate x2 when x=−6. (−6)2=36
Maximize y2: For y2 to be maximum, we need to find the value of y that gives the largest square within the range 1≤y≤5. Since squaring a number gives a positive result and the function y2 is increasing for positive y, the maximum value of y2 occurs at y=5. Calculate y2 when y=5. y20
Calculate Maximum Value: Now, we add the maximum values of x2 and y2 to find the greatest possible value of the expression x2+y2. 36 (from x2) + 25 (from y2) = 61
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